<template>
    <el-container class='home-container'>
      <!-- 头部区域 -->
      <el-header>
        <div>
          <img src="@/assets/heima.png" alt="">
          <span>电商管理后台</span>
        </div>
        <el-button type='info' @click='logout'>退出</el-button>
      </el-header>
      <!-- 页面主体区域 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '68px' : '200px'">
          <!-- 侧边栏菜单区域 -->
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409EFF"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath">
            <!-- 一级菜单的模板区域 -->
            <el-submenu :index="item.id + ''" v-for='item in menulist' :key='item.id'>
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path"
                v-for='subItem in item.children'
                :key="subItem.id"
                @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容主体 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>

</template>
<script>
export default {
  name: 'App',
  data () {
    return {
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    // 点击按钮切换菜单的折叠
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content:space-between;
    padding-left:0;
    align-items:center;
    color:#fff;
    font-size:20px;
  }
  .el-header>div{
    display: flex;
    align-items: center;
  }
  .el-header>div>span{
    margin-left: 15px;
  }
  .el-aside{
    background-color: #333744;
  }
  .el-aside .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
  .el-aside .el-menu{
    border-right: none;
  }
  .el-main{
    background-color: #EAEDF1;
  }
  .el-container{
    height: 100%;
  }
</style>
